The following is the video presentation from a joint investigation into the Nov. 8, 2018 collision of HNoMS Helge Ingstad and the merchant tanker Sola TS. Video from Accident Investigation Board Norway (AIBN) and the Defence Accident Investigation Board Norway (DAIBN)
The first-known chart of the Mersey estuary was dated 1689 – to assist sailors approaching the port. The route for ships through to the port of Liverpool, through sand banks and the powerful tides of the Irish Sea and Mersey Estuary, was a challenging business.
This video seems to be slow and boring for non maritime people, but doing the job in a good way needs a lot of experience and knowledge. And it's the very the best job in the world.